Update promise to 7.0.3

Summary:
Updates promise, and more importantly asap.  This fixes some nasty race conditions.

See:

 - https://github.com/then/promise/issues/99
 - https://github.com/then/promise/issues/93

@public

Test Plan:
sh Libraries/FBReactKit/runJestTests.sh
Open Catalyst and check it works

package.json

@@ -56,7 +56,7 @@
     "jstransform": "11.0.1",
     "module-deps": "3.5.6",
     "optimist": "0.6.1",
-    "promise": "^7.0.0",
+    "promise": "^7.0.3",
     "react-timer-mixin": "^0.13.1",
     "react-tools": "0.13.2",
     "rebound": "^0.0.12",